With heart failure, many organs don't receive enough oxygen and nutrients, which damages them and reduces their ability to function properly. Most areas of the body can be affected when both sides of the heart fail.

The most common causes of heart failure are hypertension (high blood pressure) and coronary artery disease (for example, you have had a heart attack). Other structural or functional causes of heart failure include the following:

Valvular heart disease

Congenital heart disease

Dilated cardiomyopathy

Lung disease

Heart tumour

Heart failure becomes more common with advancing age. You are also at increased risk for developing heart failure if you are overweight, have diabetes, smoke cigarettes or abuse of alcohol.

Symptoms

Weight gain

Swelling of feet and ankles

Swelling of the abdomen

Pronounced neck veins

Loss of appetite, indigestion

Nausea and vomiting

Shortness of breath with activity, or after lying down for a while

Difficulty sleeping

Fatigue, weakness, faintness

Sensation of feeling the heart beat (palpitations)

Irregular or rapid pulse

Decreased alertness or concentration

Cough

Decreased urine production

Need to urinate at night

Some patients with heart failure have no symptoms. In these people, the symptoms may develop only with these conditions:

Infections with high fever

Anemia

Abnormal heart rhythm (arrhythmias)

Hyperthyroidism

Kidney disease

Signs and tests

A physical examination may reveal either an irregular or a rapid heartbeat. There may be distended neck veins, enlarged liver, swelling of the limbs (peripheral oedema), and signs of fluid around the lungs (pleural effusion).

Listening to the chest with a stethoscope may reveal lung crackles or abnormal heart sounds. Blood pressure may be normal, high, or low.

An enlargement of the heart or decreased heart functioning may be seen on several tests, including the following:

ECG, which may also show arrhythmias

Chest x-ray

Echocardiogram

CT angiography

Heart catheterisation

Nuclear heart scans

This disease may also alter the following test results:

CBC

Blood chemistry

Serum sodium

Urea and creatinine

Liver function tests

Serum uric acid

Brain natriuretic peptide (BNP)

Urinalysis

Urinary sodium

Creatinine clearance

Swan-Ganz measurements (right heart catheterization)

If excessive fluid has accumulated around the sac surrounding the heart (pericardium), you may need to have the fluid removed through a pericardiocentesis.

Treatment

If you have heart failure, your doctor will monitor you closely. This means having follow up appointments at least every 3 to 6 months, figuring out any underlying cause and treating it, and periodic testing of your heart function. For example, an ultrasound of your heart, called an echocardiogram, will be done once in awhile to give an estimate of how well your heart is pumping blood with each stroke or beat.

It is also your responsibility to carefully monitor yourself and help manage your condition. One important way to do this is to track your weight on a daily basis and limit the amount the fluid that you drink. Weight gain can be a sign that you are retaining fluid and that the pump function of your heart is worsening. Make sure you weigh yourself at the same time each day and on the same scale, with little to no clothes on.

Other important measures include:

Take your medications as directed. Medications, particularly Betablockers, form the foundation of medical therapy and should be taken EVERYDAY without fail. Carry a list of medications with you wherever you go.

Limit salt and sodium intake.

Don’t smoke and limit alcohol.

Stay active. For example, walk or ride a stationary bicycle. Your doctor can provide a safe and effective exercise plan based on your degree of heart failure and how well you do on tests that check the strength and function of your heart. DO NOT exercise on days that your weight has gone up from fluid retention or you are not feeling well.

Lose weight if you are overweight.

Get enough rest, including after exercise, eating, or other activities. This allows your heart to rest as well. Keep your feet elevated to decrease swelling.

Here are some tips to lower your salt and sodium intake:

Look for foods that are labeled “low-sodium,” “sodium-free,” “no salt added,” or “unsalted.” Check the total sodium content on food labels. Be especially careful of canned, packaged, and frozen foods. A nutritionist can teach you how to understand these labels.

Don’t cook with salt or add salt to what you are eating. Try pepper, garlic, lemon, or other spices for flavour instead. Be careful of packaged spice blends as these often contain salt or salt products (like monosodium glutamate, MSG).

Take care when eating out. Stick to steamed, grilled, baked, boiled, and broiled foods with no added salt, sauce, or cheese.

Use oil and vinegar, rather than bottled dressings, on salads.

Eat fresh fruit when having dessert.

Your doctor may consider prescribing the following medications:

Beta-blockers – these drugs are the most powerful drugs in helping you to improve the strength of the heart and returning it back to its original size and strength.

ACE inhibitors such as Accupril open up blood vessels and decrease the work load of the heart. These have become an important part of treatment. They strongly compliment beta-blockers in reducing heart enlargement especially after a heart attack.

Diuretics -- there are several types including thiazide, loop diuretics, and potassium-sparing diuretics; they help rid your body of fluid and sodium that characterises heart failure.

Angiotensin receptor blockers (ARBs) such as losartan and candesartan which, like ACE inhibitors, reduce the workload of the heart; this class of drug is especially important for those who cannot tolerate ACE inhibitors

Sometimes, hospitalisation is required for acute CHF. Hospitalized patients may receive oxygen and intravenous medications such as vasodilators and diuretics.
Medicines called inotropic agents help improve the heart's ability to pump blood. They are given by IV.

Unstable patients receiving several medications usually need also hemodynamic monitoring with Swan-Ganz catheterization.

Severe cases of CHF require more drastic measures. For example, excess fluid can be removed through dialysis, and circulatory assistance can be provided by implanted devices such as the intra-aortic balloon pump (IABP) and the left ventricular assist device (LVAD). These devices can be life-saving, but they are not permanent solutions. Patients who become dependent on circulatory support will need a heart transplant.

A number of studies have shown that heart failure symptoms can be improved with a special type of pacemaker. It paces both the right and left sides of heart. This is referred to as biventricular pacing or cardiac resynchronization therapy. Ask if you think that you are a candidate for this.

Expectations (prognosis)

Heart failure is a serious disorder that carries a reduced life expectancy. Many forms of heart failure can be controlled with medication, lifestyle change, and correction of any underlying disorder. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Complications

Pulmonary oedema

Total failure of the heart to function (circulatory collapse)

Arrhythmias including lethal arrhythmias

Possible side effects of medications include:

tiredness usually initially which improves normally

Low blood pressure (hypotension)

Light-headedness and fainting

Gastrointestinal upset (such as nausea, heartburn, diarrhea)

Cough

Muscle cramps

Calling your doctor

Call your doctor if weakness, increased cough or sputum production, sudden weight gain or swelling, or other new or unexplained symptoms develop.

Go to the emergency room or call the local emergency number (such as 111) if you experience severe crushing chest pain, fainting, or rapid and irregular heartbeat (particularly if other symptoms accompany a rapid and irregular heartbeat).

Prevention

Follow your doctor’s recommendations for treatment of conditions that may cause congestive heart failure. These recommendations may include:

Treat your high blood pressure with and medications, diet, and exercise.

Treat your high cholesterol with diet, exercise, and medication if necessary.

DO NOT smoke

Avoid alcohol use

Take an ACE inhibitor if you have heart disease, diabetes, or high blood pressure.